Resources by Jon Roygard
| Title | Available As | Summary | Date | ID | Author |
|---|---|---|---|---|---|
| Corn Planting Dates in the Piedmont and Valley Regions of Virginia: How Early is Early? | Mar 29, 2019 | 424-032 | |||
| Corn Planting Dates in the Virginia Coastal Plain: How early is early? | Feb 13, 2019 | 424-033 |